Mortising-machine.



.PATENTED AUG, 16, 1904.

H. S. SPENCER. MORTISING MACHINE.

APPLICATION FILED DBO. 4, 1903.

N0 MODEL.

UNITED STATES Patented August 16, 1904.,

PATENT OFFICE.

HARRY S. SPENCER, OF NORIVOOD, OHIO, ASSIGNOR TO J. A. FAY & I

EGAN COMPANY, OF CINCINNATI, OHIO, A CORPORATION VIRGINIA.

OF WEST MORTISING-WIACHINE.

SPECIFICATION forming part of Letters Patent No. 767,504, dated August 16, 1904.

Application filed December 4, 1906. Serial No. 183,694. (No model.)

pending on the energy and force of the stroke given the mortising chisel for performing the mortising operation, and has for its object the providing of peculiar construction of frame and bearings for the crank-shaft whereby the stroke is received by the frame for preventing vibration and affording rigidity; and the invention will be readily understood from the following description and claims and from the drawings, in which latter- Figure 1 is a perspective view of a mortising-nlachine of the class mentioned employing my invention. Fig. 2 is a side elevation of the upper or crank-shaft end of the machine, showing my improved construction and showing the pitman in uppermost position. Fig. 3 is a perspective view of the upper or crank-shaft end of the column or frame with the movable parts and bearing-caps removed, showing the construction of the frame with the solid parts of the hearings thereon. Fig. 4 is a detail in section on the line in m of Fig. 2, showing the means for securing the cap of the middle bearing of the crank-shaft; and Fig. 5 is a detail in section showing the crank connection with the pitman and outer bearing.

A is the column of the machine, on which a stock supporting table B is suitably supported.

O is the chisel-ram, which in operation is rapidly reciprocated up and down in ways D D on the column.

E is the chisel-spindle, carrying chisel F, adapted to be reversed in suitable manner for instance, as more fully shown and described in Letters Patent N 0. 384,559, granted Bugbee and Danner June 12, 1888, for mortising-machine.

G is the crank-wheel, having crank-pin g and mounted on crank-shaft g; I I, the pitman connecting the crank-wheel with the chiselram and spindle, and K K a variable-stroke device for gradually lengthening the stroke of the chisel, as more fully shown and described in said above-mentioned Letters Patent. It is of course obvious that any other construction of pitman for connecting the crank-shaft with the chisel-ram may be employed.

In machines of the character described divested of my present improvement the reacting thrust from-the chisel is conveyed through the chisel-ram, pitman, and crank-pin against the crank-wheel and crank-shaft, tending to throw that part of the crank-shaft next to the pitman upwardly, the greatest strain being on that part of the crank-shaft adjacent to the crank-wheel, said reacting thrust being also received by the removable caps of the bearings of the crank-shaft. In my present invention in order to counteract these tendencies and provide a construction in which the reacting thrust is directed toward an integral part of the column, being thereby received by and distributed in the column, I have provided a bearing for the crank-shaft adjacent to the crank Whose solid or fixed part is rigid on the column above the crank-shaft, the removable box being below the crank-shaft, and have provided the column with an extension extending integrally outside the pitman above the crankshaft and having an outer bearing whose solid or fixed part is above said crank-shaft for directing the reacting thrust of the chisel-ram toward the integral part of the column. The upper part of the column has two upwardlyextending standards L L, from one of which an extension L is projected, the extension L having a depending part L which for convenience may be a separate piece secured under said extension. The standards L L form a U-shaped structure, in the mouth of which driving-pulley M is mounted on the crankshaft. The standard L, extension L and depending part L form an inverted-U-shaped structure, in the mouth of which the crankwheel is located. The standards LL and the depending part L with the connections bestructure, the middle web and ends of which support the bearings O P Q for the crankshaft. The standard L supports the bearing 0, having its solid or rigid part 0 above the crank-shaft, its removable cap 0 being below place by bolts 0 extending past the rigid part of said bearing through the top of the column. Below the bearing 0 the column has an aperture a for receiving the cap 0. 7 bearing Q on the gooseneck extension L L has its solid or rigid part 9 above the crankshaft, the removable cap 9 thereof being below the crank-shaft. The bearing P has its solid or rigid part 3) below the crank-shaft and its removable cap 7 above the crank-shaft. It will thus be seen that the reacting thrust from the pitman is received by the solid part of bearing O, the thrust being therefore received directly by the column. It will also be seen that the thrust being directed against the crank-shaft outside the bearing 0 the tendency is to throw the crank-pin end of the crankshaft upwardly and the pulley end of said shaft downwardly and that this tendency is counteracted and the thrust received by the solid or rigid parts of the bearings P Q. In order to counteract the tilting tendency of the crank-shaft, I have provided oppositely-disposed bearings for that shaft.

The crank-pin g is secured to the crankwheel by passing its threaded end through the web of the crank-wheel, a nut g clamping the pin in place. The crank-pin also has a stud g extending therefrom, having its journal in the bearing Q, the stud g substantially forming a part of the crank-shaft proper.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In combination, a mortiser of the character described, a crank-shaft and bearings therefor having their respective solid parts arranged on opposite sides of a horizontal plane.

2. In a mortising-machine of the character described, the combination with the column, chisel-ram and pitman, of a crank-wheel having a journaled crank-pin, a crank-shaft, an overhanging extension from the column over the crank-wheel and having an outer bearing for the crank-pin journal, substantially as described.

23. In a mortising-machine of the character described, the combination with the column, chisel-ram, pitman, crank-shaft and crankwheel and driving-pulley for the crank-shaft, of a recumbent S-shaped top for the column having a bearing therein to each side of the crank-wheel, said driving-pulley being located in the upwardly-opening bend and said crankwheel being located in the downwardly-opening bend of said reclining S-shaped top, sub stantially as described.

4:. In a mortising-machine of the character The 1 described, the combination of a column, a crank-shaft journaled at its top, a crank-wheel for the crank-shaft, said crank-wheel having a crank-pin, said crank-pin having a journal extension, a pitman operated by said crankpin, a chisel-ram connected with said pitman, said shaft, the removable cap being held in an inverted bearing for the crank-shaft adjacent to said crank-wheel, a gooseneck extension of said column projecting beyond said bearing over said crank-wheel, and an inverted bearing in the end of said extension for said crank-pin journal extension, substantially as described.

5. In a poundingmortising-machine, the combination with the column, chisel-ram and pitman, of a crank-shaft for the pitman, said column having an extension whose integral part projects outside said pitman above said crankshaft, and an outer bearing on said extension having a part above said crank-shaft fixed with relation to said integral part, sub stantially as described.

6. In a pounding mortising-machine, the combination of a crank-shaft having a crank, a bearing therefor adjacent to said crank having its solid part above and another bearing therefor having its solid part below said crankshaft.

7. In a pounding 1nortising-machine, the

combination of a column, a crank-shaft having a crank, a bearing for said crank-shaft adjacent to said crank whose solid part is rigid on the column above said crank-shaft, a remov able cap for said bearing below said crankshaft, and a second bearing for said crankshaft whose solid part is rigid on the column below said crank-shaft and a removable cap for said last-named bearing above said crankshaft, substantially as described.

8. In a pounding mortising-machine, the combination with the crank-shaft, chisel-ram and pitman, of oppositely-disposed bearings for the crank-shaft having their solid parts re spectively above and below the crank-shaft for receiving the tilting strain on said crank-shaft, substantially as described.

9. In a pounding mortising-machine, the combination with the column, chisel-ram, pitman, crank-shaft and. driving-pulley for the crankshaft, of a recumbent S-shaped top for the column, said driving-pulley being located in the upwardly-opening bend and the crank of said crank-shaft being located in the downwardly opening bend of said reclining S- shaped top, and relatively inverted bearings in the ends and an inverted bearing in the middle web of said reclining S-shaped top for said crank-shaft.

In testimony whereof I have signed my name hereto in the presence of two subscribing witnesses.

HARRY S. SPENCER. itnesses:

JOHN F. KRENKEL, J OHN J. TIGHE. 

